Column-I		Column-II
I.	Streptomyces	A.	Nitrogen fixation
II.	Rhizobium	B.	Source of antibiotics
III.	Nitrosomonas	C.	Vinegar synthesis
IV.	Acetobacter	D.	Nitrification

Which of the combinations is correct?

	I	II	III	IV
(1)	B	A	D	C
(2)	C	D	A	B
(3)	A	B	C	D
(4)	D	B	A	C

Which of the combinations is correct?

Which of the combinations is correct?

Which of the combinations is correct?

Following is the sewage treatment. In which of the following options, correct word for all the four numbers (1, 2, 3 and 4) are indicated:

(1) 1 - Large aeration tanks; 2 - Chemically agitation; 3 - High; 4 - Anaerobic

(2) 1 - Large aeration tanks; 2 - Mechanically agitation; 3 - Low; 4 - Anaerobic

(3) 1 - Large aeration tanks; 2 - Mechanically agitation; 3 - Low; 4 - Aerobic

(4) 1 - Large aeration tanks; 2 - Mechanically agitation; 3 - High; 4 - Anaerobic

Following is the curd formation from milk. In which of the following options, correct word for all the two numbers (1 and 2) are indicated:

(1) 1 - Lactic acid; 2 - Increased vitamin B₁

(2) 1 - Lactic acid; 2 - Increased vitamin B₂

(3) 1 - Lactic acid; 2 - Increased vitamin B₁₂

(4) 1 - Lactic acid; 2 - Increased vitamin C

Which of the following statements is correct?

A. Single cell protein is rich in high quality proteins but poor in fat.

B. BOD is the amount of oxygen that would be consumed if all the inorganic matter in one litre of water were oxidized by bacteria.

C. Trichoderma sp are free living fungi that are effective biocontrol agents of several pathogens.

D. Baculoviruses are pathogens that attack insects and other arthropods.

E. Bacillus thuringiensis is first used biopesticide.

F. Lactase enzyme is used in alcoholic fermentation.

G. Mycorrhiza is a symbiotic association between fungi e.g. Glomus and vascular plant.

(1) B, C, F, G

(2) A, D, F

(3) A, C, D, E, G

(4) B, F

Benefits of mycorrhizae are:

A. Resistance to root-borne pathogens

B. Tolerance to salinity and absorption of phosphorus

C. Tolerance to drought

D. Overall increase in the plant growth and development.

(1) Only A, B

(2) Only B, C

(3) Only C, D

(4) A, B, C, D

In cheese manufacture, the micro-organisms are used for:

(1) The souring of milk only

(2) The ripening only

(3) Development of resistance to spoilage

(4) Both (1) and (2)

Which one(s) is/are correct about Cyclosporin A?

(1) It is produced by the fungus Trichoderma polysporum

(2) It is used as an immuno-suppressive agent during organ transplantation

(3) It is produced by a type of yeast, Monascus purpureus

(4) Both (1) and (2)